2007 GSA Denver Annual Meeting (28–31 October 2007)

SCHRADER, Christian M., Geology, University of Georgia, Athens, GA 30602, cms23@uga.edu, cms23@uga.edu

DATTA, Saugata, Biological & Environmental Sciences, Georgia College and State University, 204 Herty Hall, Milledgeville, GA 31061-0490, FLEMMING, Roberta L., Earth Sciences, University of Western Ontario, Rm. 120-1 Health Science Addition, London, ON N6A5B7, Canada, BHATTACHARYYA, Chitta, Geology, University of Calcutta, 35 Ballygunj Circular Road, Ballygunj Science College, Calcutta, 700019, India and CHAKRABORTY, Partha Pratim, Applied Geology, Indian School of Mines, Dhanbad, 826 004, India, saugata.datta@gcsu.edu, saugata.datta@gcsu.edu

IANNO, Adam J. and LUNDSTROM, Craig, Department of Geology, University of Illinois at Urbana-Champaign, 245 Natural History Building, 1301 W. Green St, Urbana, IL 61801, ianno@uiuc.edu, ianno@uiuc.edu

SCHWAB, Brandon Edward, Department of Geology, Humboldt State University, Arcata, CA 95521 and CASTRO, Jonathan M., Institute of Geosciences, University of Mainz (Johannes Gutenberg Universität), Becherweg 21, Mainz, 55099, Germany, bes21@humboldt.edu, bes21@humboldt.edu

BARBER, Nick Lewis, Geological Sciences, University of Missouri-Columbia, Geological Sciences Building, Columbia, MO 65201 and WHITTINGTON, Alan, Department of Geological Sciences, University of Missouri, Columbia, MO 65211, nlbtx5@mizzou.edu, nlbtx5@mizzou.edu

MARTIN, Bart S., Department of Geology and Geography, Ohio Wesleyan University, Delaware, OH 43015, bsmartin@owu.edu, bsmartin@owu.edu

NOWAK, Robert M., Department of Geology, The College of Wooster, Wooster, OH 44691, LACKEY, Jade Star, Department of Geology, Pomona College, Claremont, CA 91711 and VALLEY, John W., Department of Geology and Geophysics, University of Wisconsin, Madison, WI 53706, RNOWAK09@WOOSTER.EDU, RNOWAK09@WOOSTER.EDU

OLSEN, Luke D., Department of Earth and Planetary Sciences, Washington University in St. Louis, Campus Box 1169, 1 Brookings Drive, Saint Louis, MO 63130, BUCHWALDT, Robert, Department of Earth and Planetary Sciences, Washington University, Campus Box 1169, One Brookings Drive, St. Louis, MO 63130, DYMEK, Robert F., Department of Earth and Planetary Sciences, Washington University, 1 Brookings Drive, St. Louis, MO 63130 and EMRY, Erica L., Department of Earth and Planetary Sciences, Washington University in St. Louis, Campus Box 1169, 1 Brookings Drive, St. Louis, MO 63130, ldolsen@artsci.wustl.edu, ldolsen@artsci.wustl.edu

MAYBORN, Kyle R., Dept. of Geology, Western Illinois Univ, 1 University Circle, Macomb, IL 61455, KR-Mayborn@wiu.edu, KR-Mayborn@wiu.edu

RÄMÖ, O. Tapani¹, LUTTINEN, Arto V.¹, ANDERSEN, Tom² and KURHILA, Matti I.¹, (1)Department of Geology, Univ of Helsinki, P.O. Box 64, Kumpula, Physicum, Helsinki, FIN-00014, Finland, (2)Department of Geosciences, University of Oslo, P.O. Box 1047, Oslo, N-0316, Norway, tapani.ramo@helsinki.fi, tapani.ramo@helsinki.fi

ZHANG, Tao¹, JOHANESEN, Katharine¹, HE, Bin and PATERSON, Scott R.³, (1)Department of Earth Sciences, University of Southern California, Zumberge Hall, 3651 Trousdale Parkway, Los Angeles, CA 90089, (2)Department of Earth Sciences, University of Southern California, 3651 Trousdale Pkwy, Los Angeles, CA 90089, taozhang@usc.edu, taozhang@usc.edu

HAGER, Christian¹, STOCKLI, Daniel F.¹, DEWANE, Terrence J.¹, GEHRELS, George E.² and DING, Lin³, (1)Department of Geology, University of Kansas, Lawrence, KS 66045, (2)Department of Geosciences, University of Arizona, Tucson, AZ 85721, (3)Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China, hager@ku.edu, hager@ku.edu

KIM, Moonho¹, PARK, Maeng-Eon², SUNG, Kyu-Youl², KIM, Pilgeun³, KIM, EuiJun⁴, NO, SangGun² and LIM, SungTaek², (1)Department of Environmental Geosciences, Pukyoung National University, 599-1, Daeyeon-3dong, Nam-gu, Busan, 608737, South Korea, (2)Department of Environmental Geosciences, Pukyong National University, Pukyong National University, 599-1, Daeyeon-3dong, Nam-gu, Busan, 608737, South Korea, (3)Department of Environmental Geosciences, Pukyong National University, Pukyong national university, 599-1, Daeyeon 3dong, Namgu, Busan, 608-737, South Korea, (4)Department of Environmental Geosciences, Pukyong National University, Pukyong National University, 599-1, Daeyeon-3dong, Nam-gu, Busan, 608-737, South Korea, ijsj22reo@nate.com, ijsj22reo@nate.com

TIELKE, Jacob A.¹, KASTL, Brian C.² and JORDAN, Brennan T.¹, (1)Department of Earth Science, University of South Dakota, Vermillion, SD 57069, (2)Department of Geology, Pomona College, Claremont, CA 91711, jtielke@usd.edu, jtielke@usd.edu

EKSTRAND, Angela L., Department of Geology, Beloit College, 700 College St., Box 1486, Beloit, WI 53511, JORDAN, Brennan T., Department of Earth Sciences, University of South Dakota, 414 E. Clark Street, Vermillion, SD 57069 and ROUGVIE, James R., Department of Geology, Beloit College, 700 College St, Beloit, WI 53511, ekstrand@stu.beloit.edu, ekstrand@stu.beloit.edu

KONSTANTINOU, Alexandros, Geological and Environmental Sciences, Stanford University, 450 Serra Mall, Building 320, Building 320, Stanford, CA 94305, WIRTH, Karl R., Geology Department, Macalester College, 1600 Grand Ave, Saint Paul, MN 55105 and VERVOORT, Jeffrey, School of Earth and Environmental Sciences, Washington State University, Webster Physical Science Building 1228, Pullman, WA 99164, akonstan@stanford.edu, akonstan@stanford.edu

BROWN, Kenneth L., Department of Earth Sciences, Indiana Univ~Purdue Univ, Indianapolis, 723 W. Michigan St, SL 118, Indianapolis, IN 46202, PALMER, Emerson F., Department of Earth Sciences, Indiana Univ~Purdue Univ, Indianapolis, 723 W. Michigan St, Indianapolis, IN 46202 and BARTH, Andrew P., Department of Earth Sciences, Indiana Univ~Purdue Univ, 723 W. Michigan St, Indianapolis, IN 46202, kenlbrow@indiana.edu, kenlbrow@indiana.edu

HIRT, William H., Natural Sciences, College of the Siskiyous, 800 College Avenue, Weed, CA 96094, hirt@siskiyous.edu, hirt@siskiyous.edu

DEWALT, Heather A., Akron, OH 44312 and BARTH, Andy, Indianapolis, IN 46202, hd173106@ohio.edu, hd173106@ohio.edu

DEPINE, Gabriela V., ANDRONICOS, Christopher L. and HAMBLOCK, Julie M., Earth and Atmospheric Sciences, Cornell University, Snee Hall, Ithaca, NY 14853, gvd2@cornell.edu, gvd2@cornell.edu

LINDLINE, Jennifer, PARSON, Calvin and TRUJILLO, Rhonda, Environmental Geology Program, New Mexico Highlands University, Las Vegas, NM 87701, lindlinej@nmhu.edu, lindlinej@nmhu.edu

DUKE, Genet I., Geology, Arkansas Tech University, 1701 N. Boulder Avenue, Russellville, AR 72801, gduke1@atu.edu, gduke1@atu.edu

LUPULESCU, Marian V., Research & Collections, New York State Museum, 3140 CEC, Albany, NY, 12230, BAILEY, David G., Hamilton College, 198 College Hill Rd, Clinton, NY 13323 and MINARIK, William G., Department of Earth and Planetary Sciences, McGill Univ, 3450 University Street, Montreal, QC H3A2A7, Canada, mlupules@mail.nysed.gov, mlupules@mail.nysed.gov

AYATI, Fezzeh¹, ASADI HARONI, Hooshang² and NOGHREYAN, Mosa¹, (1)geology, Isfahan university, Isfahan, 814889538, Iran, (2)Mining, Isfahan university of tecnology, Isfahan, 814889535, Iran, f_aiaty@yahoo.com, f_aiaty@yahoo.com

CATLOS, Elizabeth J., School of Geology, Oklahoma State Univ, Stillwater, OK 74078, BAKER, Courteney, School of Geology, Oklahoma State Univ, 105 Noble Research Center, Stillwater, OK 74078 and ÇEMEN, Ibrahim, Department of Geological Sciences, The University of Alabama, Tuscaloosa, AL 35487, ej.catlos@okstate.edu, ej.catlos@okstate.edu

SEVERS, Matthew J.¹, MUTCHLER, Scott R.², BODNAR, Robert J.² and BEARD, James³, (1)Department of Geology, College of Wooster, 1189 Beall Ave, Wooster, OH 44691, (2)Department of Geosciences, Virginia Polytechnic Institute and State University, 4044 Derring Hall, Blacksburg, VA 24061, (3)Va Museum Nat'l History, 1001 Douglas Ave, Martinsville, VA 24112-4714, msevers@vt.edu, msevers@vt.edu

MERKEL, Ian S., Freeport McMoRan, Morenci, Arizona, AZ 85540, nopest@hotmail.com, nopest@hotmail.com

COSTELLO, Daniel E., Geology, Saint Norbert College, 100 Grant St, DePere, WI 54115, FLOOD, Tim P., Geology, Saint Norbert College, 100 Grant St, De Pere, WI 54115 and THOLE, Jeffrey T., Geology Department, Macalester College, 1600 Grand Avenue, Saint Paul, MN 55105, dan.costello@snc.edu, dan.costello@snc.edu

KANITPANYACHAROEN, Waruntorn, Earth & Ocean Sciences, Duke University, Box 90227, Durham, NC 27708 and BOUDREAU, Alan E., Earth & Ocean Sciences, Duke University, Old Chemistry Building, Box 90227, Durham, NC 27708, waruntorn.kanitpanyacharoen@duke.edu, waruntorn.kanitpanyacharoen@duke.edu

ALAABED, Sulaiman A., Department of Geology, Faculty of Science. UAE University, P.O.Box 17551, Al-Ain, 11757, United Arab Emirates, s.alaabed@uaeu.ac.ae, s.alaabed@uaeu.ac.ae

VERDE-RAMIREZ, Angeles, Facultad de Ingenieria, UNAM, Avenida Universidad # 3000, Ciudad Universitaria, Mexico City, 04510, Mexico, DAVILA-ALCOCER, Victor, Geologia Regional, INSTITUTO DE GEOLOGIA, UNAM, Avenida Universidad # 3000, Ciudad Universitaria, Mexico City, 04510, Mexico and CENTENO-GARCIA, Elena, Instituto de Geologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Delegacion Coyoacan, 04510, Mexico, inge_angelical@yahoo.com.mx, inge_angelical@yahoo.com.mx

RAMIREZ FERNANDEZ, Juan Alonso¹, VELASCO TAPIA, Fernando¹, VIERA DECIDA, Federico¹, VASCONCELOS FERNANDEZ, Jose Manuel¹ and GARY, Marcus², (1)Facultad de Ciencias de la Tierra, Universidad Autonoma de Nuevo Leon, AP 104, Carretera Linares Cerro Prieto Km. 8, Linares, 67700, Mexico, (2)Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78713-8902, juanaram@prodigy.net.mx, juanaram@prodigy.net.mx

MCDOWELL, Fred W., Geological Sciences, Jackson School of Geosciences, The Univ of Texas at Austin, Austin, TX 78712 and MCINTOSH, William C., New Mexico Bureau of Geology, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, mcdowell@mail.utexas.edu, mcdowell@mail.utexas.edu

PARDO VILLAVECES, Natalia, Vulcanology, UNAM, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, Instituto de Geofísica, México DF, 04510, Mexico, MACÍAS, José Luis, Volcanology Department, UNAM, Instituto de Geofísica, Campus Morelia, Morelia, 58089, Mexico, AVELLÀN, Denis Ramón, Vulcanology, UNAM, Av. Universidad 3000, Ciudad Universitaria, Instituto de Geofísica, Del. Coyoacán, México DF, 04510, Mexico, SCOLAMACCHIA, Teresa, Earth and Environmental Sciences, Ludwig Maximilians Universitaet, Theresienstrasse 41/III, Muenchen, 80333, Germany and RODRÍGUEZ, Dionisio, Geology, CIGEO, Centro de Investigaciones Geocientíficas, Colonia Miguel Bonilla Casa #165 Apdo. A 131, Managua, 3083, Nicaragua, npardov@gmail.com, npardov@gmail.com

RAITANEN, Amanda M., Geology and Environmental Geosciences, Northern Illinois University, DeKalb, IL 60115, WALKER, James A., Geology and Environmental Geosciences, Northern Illinois University, 312 Davis Hall, DeKalb, IL 60115, FEIGENSON, Mark D., Geological Sciences, Rutgers University, Piscataway, NJ 08854 and CAMERON, Barry I., Geosciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, araitanen@comcast.net, araitanen@comcast.net

DEUERLING, K.M.¹, SMITH, A.L.², FRYXELL, J.E.², DALY, G.E.² and GARCIA, R.³, (1)Geological Sciences, University of Florida, Gainesville, FL 32611, (2)Geological Sciences, California State Univ, San Bernardino, CA 92407, (3)Geology, New Mexico State Univ, Las Cruces, NM 88003, kdeuer@ufl.edu, kdeuer@ufl.edu

KILLINGSWORTH, N.L.¹, SCHNEIDER, S.², DEUERLING, K.M.³, DALY, G.E.² and SMITH, A.L.², (1)Earth Sciences, University of Arkansas, Little Rock, AR 72204, (2)Geological Sciences, California State Univ, San Bernardino, CA 92407, (3)Geological Sciences, University of Florida, Gainesville, FL 32611, nlkillingswo@ualr.edu, nlkillingswo@ualr.edu

STRAZZERE, Leonardo and GREGORI, Daniel, Cátedra de Geología Argentina, Departamento de Geología, Universidad Nacional del Sur, INGEOSUR-CONICET, San Juan 670, Bahía Blanca, 8000, Argentina, lstrazze@uns.edu.ar, lstrazze@uns.edu.ar

MARZEKI, Leila, Department of Geology, University at Buffalo, SUNY, 876 Natural Science Complex, Buffalo, NY 14260, lmarzeki@buffalo.edu, lmarzeki@buffalo.edu

HARDMAN, Denise¹, VARGA, Robert¹ and GEE, Jeffrey S.², (1)Department of Geology, The College of Wooster, Wooster, OH 44691, (2)Geosciences Research Division, Scripps Institution of Oceanography, La Jolla, CA 92093-0220, dhardman@wooster.edu, dhardman@wooster.edu

GARCIA, Miriam E., ANTHONY, Elizabeth, HURTADO, Jose and MILLER, Joseph G., Department of Geological Sciences, University of Texas at El Paso, 500 W. University Ave, El Paso, TX 79968, megarcia5@miners.utep.edu, megarcia5@miners.utep.edu

KORTEMEIER, Winifred T., Geoscience, Western Nevada College, Carson City, NV 89703 and SCHWEICKERT, Richard A., Department of Geological Sciences, University of Nevada, Reno, Reno, NV 89557, kortemei@wnc.edu, kortemei@wnc.edu

ROSS, Martin E., Geology, Northeastern Univ, 14 Holmes Hall, 325 Huntington Ave, Boston, MA 02115 and CAMP, Victor E., San Diego State Univ, 5500 Campanile Dr, San Diego, CA 92182-1020, m.ross@neu.edu, m.ross@neu.edu

SMITH, Shane V., Department of Geological and Environmental Sciences, Youngstown State University, One University Plaza, Youngstown, OH 44555 and WOLFF, John A., School of Earth and Environmental Sciences, Washington State University, Pullman, WA 99164-2812, svsmith@ysu.edu, svsmith@ysu.edu

WOOTON, Kathleen M., Dept. of Geoscience, University of Nevada, Las Vegas, Las Vegas, NV 89154-4010 and SPELL, Terry L., Department of Geoscience, Univ of Nevada Las Vegas, Las Vegas, NV 89154-4010, wootonk@unlv.nevada.edu, wootonk@unlv.nevada.edu

TEFEND, Karen S.¹, VOGEL, Thomas A.², WILSON, Colin J.N.³, DEERING, Chad D.⁴, DONATELLE, Angela² and HILDALGO, Paulo², (1)Department of Geosciences, University of West Georgia, 1601 Maple Street, Carrollton, GA 30118, (2)Geological Sciences, Michigan State University, 206 Natural Sciences Bldg, East Lansing, MI 48824, (3)Department of Geology, Auckland University, Private Bag 92019, Auckland, 1020, New Zealand, (4)Department of Geological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand, ktefend@westga.edu, ktefend@westga.edu

LOWTHER, J. Stewart, Geology Dept, University of Puget Sound, 1500 N. Warner, Tacoma, WA 98416 and WISHER, Aaron P., GeoMapNW, University of Washington, Department of Earth and Space Sciences, Box 351310, Seattle, WA 98195-1310, slowther@ups.edu, slowther@ups.edu

LANG, Helen M., Department of Geology & Geography, West Virginia University, P.O. Box 6300, Morgantown, WV 26506-6300 and GILOTTI, Jane A., Geoscience, Univ of Iowa, Iowa City, IA 52242, Helen.Lang@mail.wvu.edu, Helen.Lang@mail.wvu.edu

HARLOW, George E.¹, MANDEVILLE, Charles¹ and STRENGER, Scott E.², (1)Earth & Planetary Sciences, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024-5192, (2)Plainview-Old Bethpage John F. Kennedy High School, 50 Kennedy Drive, Plainview, NY 11803-4098, gharlow@amnh.org, gharlow@amnh.org

CHAUMBA, Jeff B., RODEN, Michael F., ALLARD, Gilles O. and PATIÑO-DOUCE, Alberto E., University of Georgia, Department of Geology, Athens, GA 30602, chaumba@uga.edu, chaumba@uga.edu

BERG, Christopher A., Department of Geosciences, University of West Georgia, 1601 Maple Street, Carrollton, GA 30118 and CARLSON, William D., Department of Geological Sciences, Univ of Texas at Austin, 1 University Station C1100, Austin, TX 78712, cberg@westga.edu, cberg@westga.edu

UKAR, Estibalitz, Geological Sciences, University of Texas at Austin, Austin, TX 78712 and CLOOS, Mark, Department of Geological Sciences, University of Texas at Austin, Jackson School of Geosciences 1 University Station C9000, Austin, TX 78712, esti.ukar@gmail.com, esti.ukar@gmail.com

FELLAH, Kamilla L., Department of Geology, The College of Wooster, Wooster, OH 44691 and LACKEY, Jade Star, Department of Geology, Pomona College, Claremont, CA 91711, KFELLAH08@wooster.edu, KFELLAH08@wooster.edu

VAIL, Rose A., Geology Department, Colorado College, 14 E. Cache La Poudre, Colorado Springs, CO 80903 and SIDDOWAY, Christine S., Geology Department, Colorado College, 14 E. Cache La Poudre St, Colorado Springs, CO 80903, r_vail@coloradocollege.edu, r_vail@coloradocollege.edu

MAUGER, Richard L., Geological Sciences, East Carolina University, Greenville, NC 27858, maugerr@ecu.edu, maugerr@ecu.edu

BOWMAN, Dannena R.¹, HAMES, Willis E.², STELTENPOHL, Mark G.¹ and ANDRESEN, Arild³, (1)Dept. of Geology & Geography, Auburn University, 210 Petrie Hall, Auburn, AL 36849, (2)Geology & Geography, Auburn University, 210 Petrie Hall, Auburn, AL 36849, (3)Dept. of Geosciences, University of Oslo, PO Box 1047, Blindern, Oslo, 0316, Norway, bowmada@auburn.edu, bowmada@auburn.edu

KONISHI, Hiromi, Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton St, Madison, WI 53706, XU, Huifang, Department of Geology and Geophysics, Univesity of Wisconsin-Madison, 1215 W Dayton St, Madison, WI 53706, DYMEK, Robert F., Department of Earth and Planetary Sciences, Washington University, 1 Brookings Drive, St. Louis, MO 63130 and LI, Xiaochun, Department of Mechanical Engineering, Center for Structurally Integrated Micro/Nano-Systems, University of Wisconsin-Madison, 1513 University Avenue, Madison, WI 53706, hfxu@geology.wisc.edu, hfxu@geology.wisc.edu

OWENS, Brent E., Department of Geology, College of William and Mary, Williamsburg, VA 23187 and KREMSER, Daniel T., Battelle Memorial Institute, Columbus, OH 43201, beowen@wm.edu, beowen@wm.edu

FIELDS HATHERLEY, Lori and TRIPATHI, Akhilesh, Rigaku Americas Corporation, 9009 New Trails Drive, The Woodlands, TX 77381, lori.fields@rigaku.com, lori.fields@rigaku.com

SOCHALSKI, Lindsay Marie, Geography and Geology, Eastern Michigan University, 205 Strong Hall, Ypsilanti, MI 48197 and CLARK, Christine M., Dept. of Geography and Geology, Eastern Michigan University, 203 Strong Hall, Ypsilanti, MI 48197, lsochals@emich.edu, lsochals@emich.edu

WEBB, Laura D., Department of Geology, Bowling Green State University, 190 Overman Hall, Bowling Green, OH 43403 and CLARK, Christine M., Dept. of Geography and Geology, Eastern Michigan University, 203 Strong Hall, Ypsilanti, MI 48197, lwebb@bgsu.edu, lwebb@bgsu.edu

BUNKER, Kristin L., STROHMEIER, Brian R., HARRIS, Karen E., HOCH, Reuven and LEE, Richard J., RJ Lee Group, Inc, 350 Hochberg Road, Monroeville, PA 15146, bstrohmeier@rjlg.com, bstrohmeier@rjlg.com

FREEMAN, Emily D.¹, XU, Huifang², KONISHI, Hiromi¹, BLÖTHE, Marco¹ and RODEN, Eric², (1)Geology and Geophysics, University of Wisconsin - Madison, 1215 W. Dayton St, Madison, WI 53706, (2)Geoscience, University of Wisconsin - Madison, 1215 W Dayton St, Madison, WI 53706, edfreeman@wisc.edu, edfreeman@wisc.edu

MASALEHDANI, M. Naze-Nancy¹, BLACK, Philippa M.² and KOBE, Huldrych W.², (1)Sciences de la Terre, Université de Lille 1, Centre National de la Recherche Scientifique, 8110 “Processus et Bilans des Domaines Sédimentaires, Villeneuve d’Ascq, 59655, France, (2)Geology, University of Auckland, Private bag, Auckland, 92019, New Zealand, Naze-Nancy.Masalehdani@univ-lille1.fr, Naze-Nancy.Masalehdani@univ-lille1.fr

RUSK, Brian G.¹, HOFSTRA, Albert H.², LEACH, David L.², VALLEY, John W.³, KITA, N.T.⁴, LOWERS, Heather A.⁵ and KOENIG, A.E.⁶, (1)US Geological Survey, Denver Federal Center MS 963, Denver, CO 80225, (2)US Geological Survey, Denver Federal Center MS 973, Denver, CO 80225, (3)Department of Geology and Geophysics, Univ of Wisconsin, Madison, WI 53706, (4)Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, WI 53706, (5)U.S. Geological Survey, Box 25046, M.S. 973, Denver Federal Center, Denver, CO 80225, (6)USGS, Box 25046, MS 973, Denver, CO 80225, bgrusk@usgs.gov, bgrusk@usgs.gov

GUTIERREZ Jr, Rodrigo, Geology, UNAM, Av Universidad 3000, Insurgentes Sur 4411 edif 39-302, Mexico city, 14430, Mexico, greatijulk@yahoo.com.mx, greatijulk@yahoo.com.mx

DETRIE, Theresa¹, ROSS, Nancy¹, WELCH, Mark² and ANGEL, Ross J.³, (1)Dept. of Geosciences, Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24061, (2)Mineralogy, The Natural History Museum, Cromwell Road, London, SW7 5BD, United Kingdom, (3)Department of GeoSciences, Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24061, taddet@vt.edu, taddet@vt.edu